The Evidence Is Circumstantial

It's been hard to find out more because the chinese state has been very keen, indeed, not to say anything very much about this. Much of the information we've had has come actually from the soviets and then the russians who did the inspection on the ground in mongolia. And some of the evidence is quite circumstantial. But nobody, as far as i know, has found any last minute notes, or any particular documentation suggesting what they thought they were doing.